38mm x 30.48m Continuous Thermal Label Roll
£9.59 inc. VAT each
4 x 6" - Royal Mail & Parcelforce Direct Thermal Label Rolls
£10.74 inc. VAT each
7 Per Sheet Laser Labels - 192x39mm
£2.39 inc. VAT each
Air Packaging Bottle Inflatable Packaging
£0.37 inc. VAT each
Air Packaging Ceramics Inflatable Packaging
£0.35 inc. VAT each
Air Packaging Digital & Heavy Duty USB Hand Pump
£73.84 inc. VAT each
Air Packaging Electronics Inflatable Packaging
£0.35 inc. VAT each
Air Packaging Heavy Duty Hand Pump
£19.72 inc. VAT each
AirPro Envelopes
£0.08 inc. VAT each
Book Wrap Mailers
£0.40 inc. VAT each
Brown PiP Large Letter Postal Box - 220mm x 190mm x 19mm
£5.36 inc. VAT each
Brown PiP Large Letter Postal Box - 223mm x 138mm x 20mm
£7.82 inc. VAT each
Brown PiP Large Letter Postal Box - 240mm x 210mm x 19mm
£6.00 inc. VAT each
Brown PiP Large Letter Postal Box - 344mm x 235mm x 17mm
£13.70 inc. VAT each
Brown PiP Large Letter Postal Box - 344mm x 235mm x 20mm
£9.59 inc. VAT each
Bubble Wrap
£22.94 inc. VAT each
Cake Boxes
£0.58 inc. VAT each
Candle Boxes
£0.36 inc. VAT each
Capacity Book Mailers
£0.24 inc. VAT each
Cardboard Envelopes & Mailers
£0.24 inc. VAT each
Everything in this collection is sized to fit within the Royal Mail Large Letter format, maximum 353 x 250 x 25mm, so you can post lightweight items through the cheaper large letter rate instead of a parcel service. Parcelsend stocks these mailing bags, padded mailers and boxes in the UK for same-day despatch. See our Royal Mail Small Parcel sized packaging if your item needs more depth.
How to choose the right Large Letter packaging
The key measurement is depth: Royal Mail Large Letter allows a maximum of 353 x 250 x 25mm and up to 750g, so anything you pack must stay flat enough to fit that 25mm limit once sealed.
Flat and low-profile items
Documents, small clothing items, cards and thin flat goods are natural fits for this format, particularly in a padded mailer for light cushioning.
Checking your packed depth
Always measure your item once it's packed, not before, as padding and sealing can push a parcel over the 25mm limit and into a more expensive rate.
Why order Large Letter packaging from Parcelsend UK
These stock lines are held in the UK and despatched same-day before our daily cut-off, with volume pricing for regular senders and free UK delivery over £100. Browse our wider padded envelopes and mailers range or step up to mailing boxes and cartons for bulkier items.
Key takeaways
- Royal Mail Large Letter allows a maximum size of 353 x 250 x 25mm, up to 750g.
- Always check your packed depth, not the empty packaging depth.
- Padded mailers and slim boxes in this collection are built to stay within that limit.
- All lines are UK-stocked for same-day despatch before the daily cut-off.
- Volume pricing is available, with free delivery on UK orders over £100.
Frequently Asked Questions
What's the maximum size for Royal Mail Large Letter?
Royal Mail Large Letter allows a maximum of 353 x 250 x 25mm and up to 750g once packed and sealed.
What kind of items fit this format?
Flat, lightweight items such as documents, cards, thin clothing and small flat goods are best suited to this format.
Should I measure my item before or after packing?
Always measure the finished, sealed parcel, as padding can push your item over the 25mm depth limit and into a different postage rate.
What if my item is too thick for Large Letter?
If it exceeds 25mm once packed, see our Royal Mail Small Parcel sized packaging for the next size band.
Are padded mailers available in this size range?
Yes, browse our wider padded envelopes and mailers range for padded options built to this size limit.
How quickly are these items despatched?
Plain stock lines are held in the UK and despatched same-day when ordered before our daily cut-off.
